Burglar-alarm



(No Model.)

H D. SAUL.

BURGLAR ALARM.

1%., 348,781. Patented Sept. 7, 1886.

WITNESSES UNITED STATES PATENT OFFICE.

HERMAN D. SAUL, OF THOMAS'ION, CONNECTICUT.

BURGLAR-ALARM.

SPECIFICATION forming part of Letters Patent No. 348,781, datedSeptember 7, 1886.

Application filed May 20, 1886. Serial No. 102,764.

To all whom it may concern.-

Be it known that I, HERMAN D. SAUL, a citizen of the United States ofAmerica, residing at Thomaston, in the county of Litchfield and State ofConnecticut, have invented certain new and useful Improvements inBurglar-Alarms; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appcrtai'ns to make and use thesame, reference being had to the accompanying drawings, and to lettersor figures of reference marked thereon, which form a part'of thisspecification.

My invention relates to certain new and useful improvements inburglar-alarms for win- (lows, the object of my invention being toprovide a means whereby an alarm will be given when a window is raisedor lowered; and to this end my invention consists in the constructionand combination of the parts, as will be hereinafter fully set forth,and specifically pointed out in the claims.

In the accompanying drawings, which illustrate my invention, Figure 1 isa side view of my improved burglaralarm, showing the same applied to awindow. Fig. 2 is an interior view showing the operating mechanism. Fig.3 is a sectional view taken through the line a: a; of Fig. 2; and Fig. 4is a detail perspective View.

A refers to the window-frame, within which the sash A slides, saidwindow-frame adjacent to the sash being provided with a block, a, whichis rigidly attached thereto by means of screws. This block a is providedwith a recess, a, and an upper inclined edge, a, the purposes of whichwill be hereinafter fully set forth.

B refers to the casing or supporting-frame of the alarm mechanism, whichis of ordinary construction, and is provided with upwardlyprojectingside pieces, I) b, which serve as supports for a top plate, B. Thiscasing supports a central shaft, C, which projects through and above thetop plate, and is screw-threaded for the reception of the bell or gongD, said bell or gong also serving as a means for winding the spring (I,which is attached to the, lower portion of the shaft C within thecasing. This shaft has loosely mounted thereon acog-wheel, c, to whichis attached a spring-pawl, which (No model.)

upper portion of the casing is provided with a spring-bolt, G, whichprojects through the side pieces, I), thereof, suitable perforations insaid side pieces serving as guides for said bolt. The outer end of thisbelt is bifurcated, and has attached thereto a pivoted locking-plate, H,which is placed vertically when it is desired to place the bolt in aposition to set the alarm mechanism, and when said latch is turned to ahorizontal position, as shown in dotted lines in Fig. 2, the bolt willbe withdrawn within the casing, so as not to strike against the block a,thereby placing the alarm mechanism unset. The bolt G has its rearportion encircled by a spiral spring, 9, which bears against one of theside pieces and a pin attached to the bolt, so as to have a tendency tothrow the end 9 out of the casing, the outward movement of the said'boltbeing limited by a pin, 9, attached to its forward end. The side of thisbelt near its front end is provided with a projecting pin, 71., havingbeveled sides, said pin being adapted to engage with an angular block,E, attached to the spring-bar E, so that when the bolt G is moved ineither direction the pin 71 bearing upon the side of the block E, willelevate the same, so as to-raise the spring-bar E.

The spring-bar E, hereinbeforc referred to, is attached to the innerside of the coveringplate B, and extends over the cog-wheel a, so thatthe perforation c therein will be in the path of the upwardly-projectingpin 0, which carries the spring-pawl. The triangular block E, which isattached to the bar E, lies in the path of the pin h, which projectsfrom the side of the bolt Gr. 7

In order to set the device the pivoted locking-plate H is turned to avertical position, as shown in Fig. 2, thus allowing the opposite end ofthe spring-bolt to project through the casing, the alarm mechanism beingfirst wound IOO by turning the bell. When the window is closed, the endof the spring-bolt will bear against the sideof the plate a, thetriangular blocks lying to one side of the pin h. \Vhen the sash-fran1eis moved, the sliding bolt will spring into the recess a of the plate a,which movement will raise thespring-barE and cause an alarm to besounded. The bolt G will prevent the sash being fully raised until thebolt is withdrawn from the recess. As soon as the pin 0 is released, thealarm mechanism will vibrate the bell-hammer and will cause the alarm tobe sounded, which alarm will sound until the wheel 0 makes a completerotation. During the day the alarm can be unset by simply turningthe'locking-plate *H.

I claim- 1. The improved burglar-alarm for windowsashes, consisting of acasing which is adapted to be attached to the sliding sash, said casinginclosing a spring and train of gearing, a bellhammer adapted to bevibrated by the same, one of the wheels of the train having a projecting pin, the spring-bar E, provided with a perforation, 0, adaptedto engage with the projecting pin, and an angular end, E, in combinationwith a sliding bolt with a projecting pin, 71., which engages with theend E of the spring-bar, so as to elevate the same, substantially asshown, and for the purpose set forth.

2. The combination, in a burglaralarm, of a casing inclosing aspring-operated mechanism for vibrating a bell-hammer, spring-bar forreleasing the train of gearing, and bell, D, attached to thewinding-shaft of the spring, substantially as shown, and for the purposeset forth.

3. The combination, in a burglar-alarm, of a spring-actuated train ofgearing for vibrating a bell-hammer, a spring-bolt, G, having aprojecting pin, it, and a locking-plate, H, secured thereto, andaspring-bar, E, having an angular portion, E, adapted to engage with apin, 71 of the sliding bolt, so as to elevate the said spring-bar, saidspring-bar having a perforation, c, which engages with a projecting pinattached to the main wheel of the gearing, substantially as shown, andfor the purpose set forth.

In testimony whcreof I affix my signature in presence of two witnesses.

HERMAN D. SAUL.

XVitnesses:

ALBERT P. BRADSTREET, FRANK XV. ElI-IERIDGE.

